Super cool! Felt like I was playing some mech warrior. The weapons felt great and having to balance between the three while having to worry about heat really made me think about how I fought! The only thing more I could wish for is that the trees weren't so invincible and in the way sometimes.
Couple small things though: not sure if it was intentional or not, but if you just keep turning the mech on and off again you can heal back up to 99% hull. Each subsequent time after the first only did it by a few percentage points but still. Also once you die at the end, at least for me the mouse didn't pop up so I couldn't press quit.
Other than those small things though fantastic job! Great atmosphere, great feeling controls, and the cockpit and mech functionality was fantastic. I'd love to see more.